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Sidana [21]
3 years ago
7

Dave and Kirk are learning about electromagnetic waves in class. Dave says that gamma rays are the most dangerous because they c

ome from outer space. Kirk disagrees. Kirk says that gamma rays are not as dangerous as ultraviolet waves since they cause sunburn. Who is right and why?
Dave is partly right in his answer that gamma rays are the most dangerous, but it is because of their frequency and wavelength, not where they come from.


Neither are right because X-rays have radiation and are the most dangerous. That is why you have to wear a lead vest when you get dental x-rays.


Neither are right. Microwaves are the most dangerous because they have the longest wavelength and the biggest frequency. Microwave kill all living things.


Kirk is right. Ultraviolet waves cause sunburn and that can be very dangerous. Too much sun can cause skin cancer.
Computers and Technology
1 answer:
katen-ka-za [31]3 years ago
7 0

I’d say A: Dave is partly right in his answer that gamma rays are the most dangerous, but it is because of their frequency and wavelength, not where they come from.

Gamma rays are the most intense and thus, most harmful electromagnetic waves. Gamma rays radiation poisoning is difficult to shield against. These rays have the most energy and can go through six feet of concrete and damage your DNA as well. The higher the energy waves (gamma, x-ray), the shorter the wavelengths

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When two or more links need to pass traffic as if they were one physical link, which of the following would be used to satisfy t
leva [86]

Answer: C)LACP

Explanation: LACP(Link Aggregation Control Protocol) is the protocol that is responsible for the management of the physical ports present on a particular channel. The main purpose of this protocol is to improve performance by laying the network in the parallel structure so that traffic can be managed.

Other option are incorrect because they don't provide traffic management over the physical link. Thus, the correct option is option(C).

6 0
3 years ago
Have main create two objects: setA and setB.Input the values into setA (end with a 0 or negative) and input the values into setB
kvasek [131]

Answer:

C code is explained below

Explanation:

Sets.h:

#ifndef SETS_H

#define SETS_H

class Sets

{

    private:

         static const int s = 4;

         int na[s];

    public:

         //for constructor

         Sets();

         //function declaration for add the element

         void addElement(int);

         //function declaration for get the element

         int getElement(int);

         //function declaration for get size

         int getSize();

         //function declaration for check sub set

         bool isSubset(const Sets &);

         //function declaration for check the proper subset

         bool isProper(const Sets &);

         //function declaration for display the set

         void printSet();

         //function declaration for display the ordered set

         void Sets::printOrderedPairs( const Sets &);

};

#endif

Main.cpp:

#include "Sets.h"

#include <iostream>

using namespace std;

//constructor

Sets::Sets(){

   for (int i = 0; i < s; i++){

       na[i] = -1;

   }

}

//function definition for get size

int Sets::getSize(){

   return s;

}

//function definition for add the elements

void Sets::addElement(int l){

   for (int i = 0; i < s; i++){

       if (na[i] == -1){

           na[i] = l;

           break;

       }

   }

}

//function definition for get element

int Sets::getElement(int j){

   if (j < s){

       return (-1);

   }

   else{

       int t;

       t = na[j];

       return t;

   }

}

//function definition for check the subset

bool Sets::isSubset( const Sets &b ) {

  for (int i = 0, j = 0; i < b.s; i++ ) {

          while ( j < s && na[j] < b.na[i] ) ++j;

       if ( j == s || na[j] > b.na[i] )

           return false;

   }

   return true;

}

//function definition for check the proper subset

bool Sets::isProper( const Sets &b ) {

   int ne = 0;

   for (int i = 0, j = 0; i < b.s; i++ ) {

       while ( j < s && na[j] < b.na[i] ) ++j;

       if ( j == s || na[j] > b.na[i] )

           return false;

       ++ne;

   }

   return ne < s;

}

//function definition for display the ordered set

void Sets::printOrderedPairs( const Sets &b){

   cout << "A X B = {";

   for (int i = 0; i < s; i++){

       for (int j = 0; j < b.s; j++){

           cout << '(' << na[i] << ", " << b.na[j] << "), ";

     }

   }

   cout << "\b\b} ";

}

//function definition for display the set

void Sets::printSet(){

   cout << "{";

   for (int i = 0; i < s; i++){

       cout << na[i] << ",";

   }

   cout << "}";

}

//main function

int main()

{

   //object for Set A

   Sets a;

   //object for Set B

   Sets b;

   //add the element for Set A

   a.addElement(1);

   a.addElement(2);

   a.addElement(3);

   a.addElement(4);

    //add the element for Set B

   b.addElement(3);

   b.addElement(4);

   b.addElement(5);

   b.addElement(6);

   //display the set A

   cout << "Set A: ";

   a.printSet();

   cout << endl;

   //display the set B

   cout << "Set B: ";

   b.printSet();

   cout << "\n" << endl;

   //display the A X B

    a.printOrderedPairs(b);

   cout << "\n" << endl;

    //chrck the subset

   if (a.isSubset(b) == true){

       cout << "Set B is subset of set A" << endl;

   }

   else{

       cout << "Set B is not a subset of set A" << endl;

   }

    //check the proper subset

   if (a.isProper(b) == true){

       cout << "Set B is proper subset of set A" << endl;

   }

   else{

        cout << "Set B is not a proper subset of set A" << endl;

   }

   system("PAUSE");

   return 0;

}

6 0
4 years ago
Top Down Design makes it easier to solve a problem by:___________
vaieri [72.5K]

Answer:

c) Starting with the biggest function and then moving to smaller ones

Explanation:

This design is a breakdown of a structure to determine the text functionality for small parts. The system analyzes the built-in top-down style, which defines and does not define some first-level components, often referred to as an unstable layout.

so correct answer is c) Starting with the biggest function and then moving to smaller ones

4 0
3 years ago
Assuming a user enters 25 as input, what is the output of the following code snippet? int i = 0; Scanner in = new Scanner(System
Dmitry_Shevchenko [17]

Answer:

The correct answer for the given question is 24

Explanation:

In the given  question the value of variable i entered by the user is 25 i.e the value of i is 25 control checks the condition of if block which is false .So control moves to the else block and executed the condition inside the else block means it executed i-- decrements the value of i by 1 means i is 24

Following are the program of java :

import java.util.*;// import package

public class Main // main class

{

// main method

public static void main(String[] args)

{

int i = 0;  // variable declaration

Scanner in = new Scanner(System.in); // creating class of scanner class

System.out.print("Enter a number: ");

i = in.nextInt();  //  user input

if (i > 25)  // check if block

{

i++; // increment the value of i

}

else

{

   i--; // decrement the value of i

}

System.out.println(i);  // display i

}

}

Output:

Enter a number:25

24

8 0
4 years ago
The ________ stage of a project involves such activities as forming a team, allocating resources, preparing project documentatio
marysya [2.9K]

Answer:

b. organizing

Explanation:

In the organising stage of a program life cycle involves such activities as forming a team, allocating resources, preparing project documentation, and ensuring good communication.

The organising stage can also comprise of the following activities;

1) To properly Organise and prepare a project.

2) Typically it involves conducting research and making use of its results to design a prototype or service for testing.

3) Here there is also nees to prepare and implement a schedule

4) Identifying the targets within the project

5) Distributing the tasks and resources to the team

6) Adjusting the members of the project team as needed

6 0
4 years ago
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